ZVac 15 Nutone CV-391 Vacuum Bags Generic Part Replaces Part Numbers 68703-6, 68703 Fits: PP600, CV353, CV750, CV352, PP650, CV450, PP500, CV352W, CV653, CV350. PREMIUM PRODUCT: 15-Pack of generic Nutone vacuum bags by ZVac. Generic replacement for the original OEM Nutone CV-391 vacuum bags. Replaces part numbers 44186 & 63165. Fully compatible with most Nutone vacuum models (see description for Supported Models). Removes allergens and dust from the air, helping to relieve allergies and asthma. Please note: This is not an OEM product and is not covered under any manufacturer's warranty.